Auxiliary log-supporting means for clapboard-sawing machines



E. M. GRAY.

AUXILIARY LOGSUPPORTiNG MEANS FOR CLAPBOARD SAWING MACHINES. APPLICATION FlLED SEPT.20. 1920.

1,381,183. PatentedJune 14, 1921.

3 nvewtoc Edwz'zzM Gray lrmm i. STATEE EDWIN M. GRAY, 0E EVERETT, VIASHINGTON.

AUXILIARY LCtG-SUPPORTING MEANS FOR CLAPBQARD-SAWING IEACHINES.

' Specification 01" Letters Patent. Pakgmted J 141 1921 Application lied September 20, 1920. Serial No. 411,460.

have invented certain new and useful Ina-1 provements in Auxiliary Log-Supporting Means for Clapboard-Sawing Machines, of which the following is a specification.

My invention relates to clapboard sawing machines and comprises particularly an au:;

iliary log-supporting means therefor.

in object of my invention is to provide means whereby logs of larger diameter than the maximum for which the machine is designed may be properly and conveniently sawed into clapboards.

Another object of my invention is to provide means whereby logs having rotten or hollow cores, whether of the usual small d1- ameter or larger than the usual size, may be sawed in such manner as to utilize the good material. I

Another object of my invention 15 to provide means whereby logs of large diameter may be most efficiently sawed, producing thereby the greatest number of clapboards which it is possible to saw from'a given log.

My invention com rises those novel parts and combinations thereof which are shown in the accompanying drawings, described in the specification, and particularly defined by the claims terminating the same.

In the accompanying drawings I have shown my invention in the form which is now preferred by me, although I do not intend to limit myself to the exact construction shown.

Figure 1 is a plan view of a clapboard sawing machine illustrating my invention in use in connection therewith.

Fig. 2 is a transverse section through a clapboard sawing machine illustrating my invention in use.

Fig. 3 is a perspective illustrating my im proved constructions separate from the machine.

In sawing clapboards from logs with existing apparatus, it is the practice to center the log upon the centers of the machine, to dress its surface, and then to make a series of longitudinally extending radial cuts in the log, and then breaking out the boards so formed. It often occurs that a log has an unsound core. The centers of the machine will not hold in this core. Often the logs or bolts which it is desired to cut into clapboards are too large to be handled by the machines installed. Furthermore, it would make such machines unwieldly and diihcult to handle if they were made large.

enough to .handle these legs as they are sawed into proper lengths. Such logs may be split up into bolts which are then of a proper size to fit into the machine but which cannot be accommodated by the centers of the machine without considerable waste. My device is intended to engage the ends of such bolts so that they may be sawed in the machine with the least possible waste. Further, if the portion of the heart of the log which forms a part of the split bolt is unsound, this portion of the bolt need not be sawed and my device is so designed that it will firmly grip the sound portion of the log, and will not need to grip the unsound portion.

My device has another advantage. It often occurs that where a log is larger than the ordinary, the cuts will be more widely spaced at the periphery of the log than is desirable or necessary, and a considerable amount of wastage occurs, as the clapboards must be of uniform width at their lower edges. By the use of my device it is possible to regulate the sawing of the bolts so that the widest part of the clapboards, as sawed, is not greater than the proper width. Clapboards may be sawed from the outer portion of a log or bolt, and after the series sawed has been removed the center of rojta- 7 mounted to slide vertically by means of the rack 12 and pinion l3. -The frame 14, upon 1 which the frame 11 slides,'is longitudinally movable upon the base 15 by means of a rack 16 and pinion 17. A circular saw 2 is supported upon the base 15 and is rotated by suitable power means, as through the'pulley 20. The above details, save the centers, may be altered as desired, as they form'no part of my invention.

I provide a dog 3 which is shown herein as a plate and which has in its central portion one or more center-receiving holes or sockets 31. These are adapted to be re ceived upon the live center It or the dead center 10. At one end of the dog 3 l provide a series of bolt-engaging members which I have shown the inwardly facing teeth 32. These are preferably arranged transversely of the dog 3 or upon a ciroular are. lit the end opposite the teeth 32 I provide a socket or hole for the reception of a spacer bar to be later described. 1 have shown this hole as termed by means of a loop 33 secured upon the end oi the dog The spacer bar at is of a length approxi mating the distance between the centers 1 and 10 of the machine. At one or at both ends it may be provided with a series of transverse pin-receiving holes ll. A pin 4:2 is adapted to be received in the holes all and to abut against the inner face of the dog 3 or its loop 33 which receives the end of the bar a. The purpose or these holes a1 is to provide means for varying the efifective length of the bar d. A counter-balance 45 upon the bar 4: may be employed it desired.

in use the teeth 32 are pressed or driven into the end of a log or belt which is to be out into clapboards. The teeth must be spaced inward from the periphery otthe log, which is indicated at L, suiiiciently to avoid the saw 2 but the teeth should engage the log inward from its core enough to avoic rotten portions. The dog may be pivoted upon one or several different centers, depending upon which of the holes 81 is placed upon the centers of the machine, The log L and the spacer bar 41-. space the dogs 3 apart and their central portions are urged inward by the opposing centers 1 and 10. In this manner the log is securely gripped by the dogs 3 and the log maybe turned while so gripped by the dogs.

It is evident that by the use of my device, unsound cores may be avoided by the centers, whether they be cores of small logs or split bolts. It is also evident that by employing the diiiferent center-receiving holes 31 in succession, the angle Oil the cut with respect to the center of the log may be changed and thus clapboards may be sawed first from the outer portion of the log and then out again from its central portion. W'Vhere sawing a log inclining to the oval in cross-section, by changing the centers from one to another of the holcsfil, the radius oi: swing of the log is changed,

and the clapboards may belrept more'uniterm as to depth of cut and width at their base.

What I claim as my invention is:

1. An auxiliary dog for use with clapboard sawing machines comprising a member having centering means therein, a set 3. An auxiliary dog foruse with clap board sawing machines comprising a plate having a hole in its central portion for the reception of a center of the machine, a set of bolt-engaging teeth arranged upon a circular are at one end of the plate, and said plate having a socket at its opposite end for the reception of a spacing bar.

l. lln a clapboard sawing machine, an auxiliary bolt-gripping means comprising a pair of dogs adapted to be engaged by the opposite machine centers, bob-engaging means at one end of each of said dogs, and a spacing bar interposed between the ends of said dogs which areoppositethe boltengaging means. I

5. in a clapboard sawing machine, an auxiliary bolt-gripping means comprising a pair of dogs having means in their cen ral portion adapted to be engaged by the op posed centers of the machine, inwardly- :ta cing, bolt-engaging teeth at one end of each Git between the ends of said dogs which are opposite said teeth.

6. in a clapboard sawing machine, an auxiliary bolt-gripping means comprising a pair oi? dogs adapted to be engaged by the opposite machine centers, bolt-engaging means atone end of each of said dogs, a spacsaid dogs, and a spacing bar interposed ing bar interposed between the ends of said dogs which are opposite the bolt-engaging means, and means for adjusting the effective length oi: said spacing bar.

'2'. in a clapboard sawing machine, an auxiliary bolt-gripping means comprising a pair of dogs having meansin their central portion adapted to be engaged by the opposed centers of the machine, bolt-engaging means at one end of each of said dogs, a spacing bar interposed between the ends oil said dogs which are opposite the bolt engaging means, one of said dogs haw bar-receiving holes in this end, and bar having a longitudinallyespace d series ct transverse holes near an end and a pin adapted to be received in any one of said transverse holes and to abut against the inner face of said dog, the opposite end of said bar being held against the inner face of the dog at this end. v

Signed at Everett, Snohomish county,

EDWIN M. ear. 

